Coal Conveyor Speed and Fineness Control for Boiler Load Matching
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Solution Overview
Problem
Thermal power plants face issues of high energy consumption and low efficiency in coal conveying systems due to constant-speed belt conveyors and fixed coal particle fineness, leading to low load rates and inefficient boiler operation.
Innovation Solution
A coal conveying control system that includes a model prediction module for load prediction, a load calculation module for determining coal consumption changes, a speed control module for dynamic belt speed adjustment, a quality calculation module for efficiency determination, and a fineness control module for adjusting coal particle size, optimizing coal conveying and screening processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant-speed belt conveyor is used, then operational simplicity is maintained, but energy consumption increases and load rate decreases
Solution Approach 1:
The patent applies dynamics by transitioning from constant-speed belt conveyor to variable-speed belt conveyor, where the conveying speed is dynamically adjusted based on real-time boiler load requirements. The control system continuously monitors boiler operating parameters and automatically adjusts the conveyor speed to match actual coal consumption needs, thereby reducing energy consumption while maintaining operational efficiency.
Solution Approach 2:
The patent implements parameter changes by modifying the operating parameters of the belt conveyor system. Specifically, it changes the speed parameter from fixed to variable, and adjusts coal particle fineness parameters dynamically. These parameter modifications enable the system to adapt to different operational conditions, optimizing energy efficiency while maintaining ease of operation through automated control.
2Ease of operation
If fixed coal particle fineness is used, then screening process simplicity is maintained, but boiler operation efficiency decreases
Solution Approach 1:
The patent applies dynamics to the screening process by replacing fixed coal particle fineness with dynamically adjustable fineness parameters. The screening equipment automatically adjusts its operating parameters based on real-time feedback from the boiler system, enabling optimal coal particle size distribution that matches current boiler combustion requirements, thereby improving boiler efficiency while maintaining automated simplicity.
Solution Approach 2:
The patent implements feedback control in the screening process where the control system continuously monitors boiler operation parameters and coal consumption characteristics, then automatically adjusts the screening equipment parameters accordingly. This closed-loop feedback mechanism ensures that coal particle fineness is optimized for current operational conditions, improving boiler efficiency without requiring manual intervention.
3Use of energy by moving object
If variable-speed control is implemented, then energy efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies universality by designing an integrated control system that performs multiple functions: it monitors boiler load parameters, calculates coal consumption requirements, controls belt conveyor speed, and adjusts screening equipment parameters. This multi-functional control system consolidates various control tasks into a single automated platform, reducing overall system complexity while achieving variable-speed control and improved energy efficiency.
Solution Approach 2:
The patent implements self-service through automated control where the system independently monitors its own operational parameters, calculates optimal settings, and adjusts equipment without external intervention. The control system uses real-time data from sensors and process parameters to automatically optimize conveyor speed and screening fineness, eliminating the need for complex manual control mechanisms while improving energy efficiency.
4Productivity
If dynamic speed adjustment is applied, then coal conveying efficiency improves, but control system complexity increases
Solution Approach 1:
The patent applies feedback control where the system continuously monitors boiler load parameters, coal consumption rates, and conveyor performance, then automatically adjusts conveying speed based on this feedback. This closed-loop control optimizes coal conveying efficiency by matching supply rate to actual boiler needs, while the automated nature of the feedback mechanism keeps control system complexity manageable.
Solution Approach 2:
The patent implements preliminary action by pre-establishing the control architecture and parameter relationships before operation. The system is pre-configured with the necessary control algorithms and parameter correlations between boiler load and optimal conveying speed, enabling automatic dynamic adjustment without requiring complex real-time calculations or manual intervention during operation.
Data Source
AI summary
The disclosure provides a coal conveying control system and method for a thermal power plant. The system includes: a model prediction module, used for building an operating load prediction model, and obtaining a boiler operating load optimal value; a load calculation module, used for drawing an operating load difference value curve, and determining a boiler coal consumption change amount; a speed control module, used for determining a coal conveying amount of a coal conveying system, and controlling operating speed of a coal conveying belt according to the coal conveying amount; a quality calculation module, used for calculating boiler operating efficiency, and determining a coal quality parameter according to the boiler operating efficiency; a fineness control module, used for determining a coal particle parameter, setting target coal particle fineness according to the coal particle parameter, and controlling a screening and crushing device according to the target coal particle fineness.